ברוכים הבאים
The yiddish word for dumpling is 'kneydl' :)
"Happy" in Yiddish is "פֿריילעך" (fraylekh).
You would say "A dank" in Yiddish.
boruch habah. (Or booreech habooh, for a different dialect of Yiddish).
relentless
Riz
moshiyekh
Say "FAW-tehr".
try translating to a more common language and from there translate into Gaelic
Google Translate offers this: גאָרנישט and gornisht.
נישטאָ פֿאַרוואָס- nishto farvos
"Yentl" means "gentle" (or amiable).